Here are some reference photos incase you haven’t seen these. 
The Mars sunset is blue: http://www.nasa.gov/jpl/msl/nasas-curiosity-rover-views-serene-sundown-on-mars
http://www.nasa.gov/sites/default/files/styles/full_width/public/thumbnails/image/pia19662-fig1_ml_mcam04333_scales.jpg?itok=8xs5rQ05
http://www.nasa.gov/jpl/msl/pia19074
